why does my dryer run while the drum stays still?
if the dryer can be heard running while the drum remains still, switch it off. the belt, motor, tensioner or drum supports may be involved; the sound alone does not confirm a snapped belt.
let it cool and disconnect safely. do not reach into a running dryer, bypass the door switch or run with covers off. give the repairer the full dryer-section model on a stacked appliance and any history of slipping or broken belts.
the linked guides cover distinct five-rib/four-groove D511255P-style and seven-rib PH/H 7PH1971 / 1971H7 belts. the 1971 marking is a nominal effective-length designation, not a tension setting. do not stretch a substitute belt or improvise a route. LEK37/LGK37 require qualified disassembly; WDH804N8SA requires authorised service with its flammable R290 heat-pump circuit intact. gas and stacked access need suitable arrangements.
first checks
- stop and record
record the lack of movement and previous belt failures already noticed, without another trial start or panel removal.
solutions
- how to identify a five-rib dryer drive belthave the stopped drum diagnosed before choosing a belt. D511255P has five ribs and four grooves; pulleys and tensioner remain separate parts.
- how to identify a seven-rib dryer drive beltreport earlier slipping or broken belts before choosing another one. the 1971 marking identifies a nominal belt length, not a tension setting.
diy warning
working on appliances can involve mains electricity, water and moving parts. always disconnect power and water before you start. in Australia, gas work must be done by a licensed gasfitter, and fixed (hard-wired) electrical work by a licensed electrician. everything on this site is guidance only, and any repair you carry out is at your own risk. we are not responsible for any damage or injury caused by attempting a repair. if you are not confident, please use a qualified technician.
